/*
 * volume.java
 *
 * Created on 2 Οκτώβριος 2012, 8:39 πμ
 */

package students2014;

/**
 *
 * The purpose of the program is to calculate the volume of a cylinder. Inputa are the cycle radius, height
 *of the cylinder. Math.PI is used for the value of "π"
 */
import java.io.*;
public class volume {
   
       double radius, sur, height, vol;
    
    public volume()throws IOException {
        String choise;
        InputStreamReader inStream=new InputStreamReader(System.in);
        BufferedReader stdin=new BufferedReader(inStream);
        
        do{
        insert();
        calculation();
        output();
        
        System.out.println();
        System.out.print("Another calculation? [y]/[n]");
        choise = stdin.readLine();
        }while (!choise.equals("n"));
    }
    
    public void insert()throws IOException{
        InputStreamReader inStream=new InputStreamReader(System.in);
        BufferedReader stdin=new BufferedReader(inStream);
        
        System.out.print("Give me the radius : ");
        String data = stdin.readLine();
        radius = Double.parseDouble(data);
        
        System.out.print("Give me the height : ");
          data = stdin.readLine();
        height = Double.parseDouble(data);
    }
    
    public void calculation(){ 
        sur = Math.PI * (radius * radius);
        vol = sur * height;
    }
    
    public void output(){
        System.out.println("The Surface of the circle   is : " + sur);
        System.out.println("The Volume  of the cylinder is : " + vol);   
    }
    
    public static void main(String[] args) throws IOException {
        new  volume();       
    }
    
}